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        <p>Library Version 12.1.6.2</p>
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          <th colspan="3" align="center">Replication Manager Preferred Master
        Mode</th>
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          <td width="20%" align="left"><a accesskey="p" href="log_nosync.html">Prev</a> </td>
          <th width="60%" align="center">Chapter 10.  Upgrading Berkeley DB 12.1.6.0 applications to Berkeley DB 12.1.6.1 </th>
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            <h2 class="title" style="clear: both"><a id="repmgr_prefmas"></a>Replication Manager Preferred Master
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              <a href="repmgr_prefmas.html#idm140188017388048">New Parameter Values</a>
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            Replication Manager now supports preferred master
            mode for two-site replication groups. In preferred master mode, 
            one site is the preferred master site, which operates as the
            master as much of the time as its availability permits. The
            other site is the client site, which takes over temporarily
            as master when the preferred master site is unavailable. 
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              <h3 class="title"><a id="idm140188017388048"></a>New Parameter Values</h3>
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            <li><a href="../api_reference/C/repconfig.html#config_DB_REPMGR_CONF_PREFMAS_MASTER" class="olink">DB_REPMGR_CONF_PREFMAS_MASTER</a> — A new 
                    <code class="literal">which</code>
                    parameter value for the <a href="../api_reference/C/repconfig.html" class="olink">DB_ENV-&gt;rep_set_config()</a> method to indicate
                    that this site is the preferred master site.
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            <li><a href="../api_reference/C/repconfig.html#config_DB_REPMGR_CONF_PREFMAS_CLIENT" class="olink">DB_REPMGR_CONF_PREFMAS_CLIENT</a> — A new
                    <code class="literal">which</code>
                    parameter value for the <a href="../api_reference/C/repconfig.html" class="olink">DB_ENV-&gt;rep_set_config()</a> method to indicate
                    that this site is the client site in a preferred master
                    replication group.
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